CVE-2026-115774: twisted · Uncontrolled Resource Consumption
Affects twistedSource CVE Database V5
Not known to be exploited · CVSS 4.9 Medium : upgrade to 26.10.0rc1 when convenient.
Data as of 26 Oct 2026, 14:18 UTC
- EPSS
- 0.4% chance of exploitation in 30 days – higher than 37% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 26.10.0rc1
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 23 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade twisted to 26.10.0rc1.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| twistedtwisted | Affected
| Fixed in
|
AI-suggested
Upgrade Twisted to version 26.10.0rc1 or later, where this issue is fixed. No other mitigation is required as the fix fully addresses the vulnerability.
Description
CVE-2026-115774 is a vulnerability in the Twisted event-based framework affecting versions prior to 26.10.0rc1. It involves an uncontrolled resource consumption issue triggered by a negative literal size in an authenticated IMAP SEARCH command. This causes the parser cursor to move below zero, leading to an infinite loop that freezes the single-threaded reactor. The freeze halts all IMAP connections and any SMTP or POP3 services running in the same process until the service is restarted. The issue is fixed in version 26.10.0rc1.
References
- github.com/twisted/twisted/security/advisories/GHSA-2qrf-pqgx-qh9v (opens in a new tab)
- github.com/twisted/twisted/pull/12764 (opens in a new tab)
- github.com/twisted/twisted/commit/3d125548bcbe955007cb97f480bb699a5e074741 (opens in a new tab)
- github.com/twisted/twisted/releases/tag/twisted-26.10.0rc1 (opens in a new tab)